| F TEC Ltd | Professional & scientific | 2022 |
| F Turner & Sons Ltd | Wholesale & retail | 2016 |
| F W Meggitt & Co Ltd | Professional & scientific | 2019 |
| F&A Speed Ltd | Transport & logistics | 2026 |
| F&C Hospitality Helmsley Ltd | Hospitality | 2024 |
| F&C Hospitality Malton Ltd | Hospitality | 2024 |
| F&C KO. Ltd | Hospitality | 2025 |
| F&E Consultancy Services Ltd | Professional & scientific | 2023 |
| F&E FOY Ltd | Real estate | 2026 |
| F&J Marketing Limited | Professional & scientific | 2021 |
| F&J Roofing Ltd | Construction | 2025 |
| F&M Elite Ltd | Wholesale & retail | 2025 |
| F&U Holdings Ltd | Real estate | 2023 |
| F. Ainscough & Co Limited | Manufacturing | 2009 |
| F. C. Newbuild Ltd | Construction | 2020 |
| F. Mcintyre & SON Ltd | Wholesale & retail | 2003 |
| F.A.B Transport and Logistics Ltd | Transport & logistics | 2026 |
| F.A.B. Property Solutions Ltd | Real estate | 2021 |
| F.A.C.E. Benefits Advice CIC | Health & social care | 2017 |
| F.A.T.E. Developments Ltd. | Real estate | 2008 |
| F.B.I Installations Ltd | Administrative & support | 2012 |
| F.H. LEE Ltd | Extraterritorial | 1966 |
| F.J.Harford & Co. Limited | Real estate | 1963 |
| F.R.Foster Limited | Real estate | 1946 |
| F.S. Trade Limited | Wholesale & retail | 2015 |
| F.W.P. (Properties) Limited | Agriculture & fishing | 2010 |
| F.Y. Transport Company 1212 Ltd | Transport & logistics | 2025 |
| F1C Ltd | Construction | 2017 |
| F24TEAM Ltd | Arts & recreation | 2024 |
| F4E Ltd | Professional & scientific | 2008 |
| F500 Ltd | Wholesale & retail | 2026 |
| F9 Marine Ltd | Professional & scientific | 2019 |
| FA Building Services Ltd | Construction | 2021 |
| FA JPS Ltd | Wholesale & retail | 2021 |
| FA Residential Group Ltd | Real estate | 2026 |
| FAB Electrics Ltd | Construction | 2017 |
| FAB Four Forwarding Ltd | Transport & logistics | 2025 |
| FAB Furniture Limited | Wholesale & retail | 2023 |
| FAB Telecoms Limited | Information & communication | 2023 |
| Fabbuild Ltd | Construction | 2022 |
| Fabcoat Holdings Ltd | Financial services | 2025 |
| Fabiana Management Limited | Real estate | 2024 |
| Fabiano L2 Ltd | Hospitality | 2025 |
| Fable Industries Ltd | Hospitality | 2025 |
| Fabri Trading Ltd | Transport & logistics | 2016 |
| Fabri-Cater Installations Ltd | Construction | 2021 |
| Fabric Digital Ltd | Information & communication | 2022 |
| Fabric District Community Interest Company | Other services | 2017 |
| Fabric IT Ltd | Information & communication | 1992 |
| Fabric Place Liverpool Ltd | Wholesale & retail | 2024 |
| Fabricated Engineering Ltd | Manufacturing | 2021 |
| Fabstar Contracts Limited | Professional & scientific | 2003 |
| Fabtel Limited | Information & communication | 2024 |
| Fabulous Care Limited | Health & social care | 2019 |
| Fabulous GIN Company Ltd | Wholesale & retail | 2018 |
| Facades Water Testing Limited | Construction | 2011 |
| Facd Ltd | Administrative & support | 2017 |
| Face Forward Ltd | Other services | 2017 |
| Face Forward Training Academy Ltd | Extraterritorial | 2018 |
| Faceplugin Ltd | Information & communication | 2025 |
| Faces and More Limited | Other services | 2021 |
| Faceworx Ltd | Agriculture & fishing | 2018 |
| Faci UK Chemicals Limited | Manufacturing | 2014 |
| FACILIT8 UK Limited | Construction | 2007 |
| Faction Creative Limited | Professional & scientific | 2013 |
| Factor Financial Planning Limited | Financial services | 2023 |
| Factor of Safety Ltd | Construction | 2019 |
| Factoring Finance Limited | Financial services | 2014 |
| Factoring UK Group Limited | Financial services | 2004 |
| Factory Heaters Ltd | Construction | 2009 |
| FAD News and OFF Licence Ltd | Wholesale & retail | 2025 |
| Fadacship Ltd | Wholesale & retail | 2023 |
| Fadis Fresh Living Ltd | Administrative & support | 2025 |
| Fagan Joinery Limited | Construction | 2026 |
| Fagan Jones Communications Ltd. | Professional & scientific | 2009 |
| Fahdutra Ltd | Information & communication | 2024 |
| Fahmin Kabir Ltd | Health & social care | 2021 |
| FAI Chai Properties Ltd | Real estate | 2019 |
| Faiban Limited | Other services | 2023 |
| Fainterce Limited | Information & communication | 2024 |
| Fair Play Films Limited | Information & communication | 2018 |
| Fair Played Media Limited | Information & communication | 2015 |
| Fair Way Finance Ltd | Financial services | 2026 |
| Fairclough Properties Limited | Real estate | 2017 |
| Fairfield Estates (Liverpool) Ltd | Real estate | 2006 |
| Fairfield P.N.E.U. School (Backwell) Limited | Education | 1964 |
| Fairfield Rise Properties Ltd | Real estate | 2026 |
| Fairhead Advisory Ltd | Professional & scientific | 2026 |
| Fairhomes Liverpool Ltd | Real estate | 2026 |
| Fairoak Bespoke Handmade Kitchens & Joinery Ltd | Manufacturing | 2017 |
| Fairtec People Limited | Administrative & support | 2024 |
| Fairway Accounting & Consultancy Ltd | Professional & scientific | 2012 |
| Fairway Energy Limited | Construction | 2019 |
| Fairway Motors (Liverpool) Limited | Wholesale & retail | 1974 |
| Fairways Hatton Garden Ltd | Wholesale & retail | 2025 |
| Faitcy Beauty Salon Ltd | Other services | 2025 |
| Faith & Love Media Limited | Other services | 2024 |
| Faith and Friendship CIC | Administrative & support | 2026 |
| Faith and Friendship Collective Ltd | Wholesale & retail | 2025 |
| Faith Laser Ltd | Other services | 2019 |